Dressed excitonic states and quantum interference in a three-level quantum dot ladder system

被引：37

作者：

Gerardot, B. D. ^{[1
]}

Brunner, D. ^{[1
]}

Dalgarno, P. A. ^{[1
]}

Karrai, K. ^{[2
,3
]}

Badolato, A. ^{[4
]}

Petroff, P. M. ^{[5
]}

Warburton, R. J. ^{[1
]}

机构：

[1] Heriot Watt Univ, Sch Engn & Phys Sci, Edinburgh EH14 4AS, Midlothian, Scotland

[2] LMU, Ctr NanoSci, D-80539 Munich, Germany

[3] LMU, Dept Phys, D-80539 Munich, Germany

[4] Swiss Fed Inst Technol, Inst Quantum Elect, CH-8093 Zurich, Switzerland

[5] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

来源：

NEW JOURNAL OF PHYSICS | 2009年 / 11卷

基金：

英国工程与自然科学研究理事会;

关键词：

SPECTROSCOPY; EMISSION;

D O I：

10.1088/1367-2630/11/1/013028

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We observe dressed states and quantum interference effects in a strongly driven three-level quantum dot ladder system. The effect of a strong coupling field on one dipole transition is measured by a weak probe field on the second dipole transition using differential reflection. When the coupling energy is much larger than both the homogeneous and inhomogeneous linewidths an Autler-Townes splitting is observed. Significant differences are observed when the transitions resonant with the strong and weak fields are swapped, particularly when the coupling energy is nearly equal to the measured linewidth. This result is attributed to quantum interference: destructive or constructive interference with modest visibility is observed depending on the pump/probe geometry. The data demonstrate that coherence of both the bi-exciton and the exciton is maintained in this solid-state system, even under intense illumination, which is crucial for prospects in quantum information processing and nonlinear optical devices.

引用

页数：11

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